stride3d/stride · error · InvalidOperationException

Simulated PointerDevice does not exist

Error message

Simulated PointerDevice does not exist

What it means

InputSourceSimulated.RemovePointer requires the PointerSimulated instance to be in the source's pointers collection. If the pointer was never created by this source or has already been removed, the check fails and InvalidOperationException is thrown.

Solutions

1. Only remove PointerSimulated instances created by this source
2. Check membership or track removed pointers before removal
3. Use RemoveAllPointers for complete cleanup
4. Clear references after removal to prevent stale calls

Example fix

// before
source.RemovePointer(pointer);
source.RemovePointer(pointer); // throws
// after
if (pointers.Contains(pointer)) source.RemovePointer(pointer);

if (createdPointers.Contains(pointer)) source.RemovePointer(pointer);

try { source.RemovePointer(pointer); } catch (InvalidOperationException) { /* already removed */ }

When it happens

Trigger: Calling RemovePointer with a pointer not obtained from this source's CreatePointer, or a duplicate RemovePointer call for the same instance.

Common situations: Double teardown of test fixtures; pointers removed via RemoveAllPointers then removed individually; passing pointers between separate InputSourceSimulated instances.

Understand the failure class

Background: 'Could not be found', 'does not exist', 'not found in database': the resource-not-found family when an ID, slug, key, or URI lookup comes back empty — this error's family across 20 libraries.

Related errors

• Simulated GamePad does not exist
• Simulated Mouse does not exist
• Simulated Keyboard does not exist
• Can not set more than one button at a time
• The given does not correspond to any existing part.

AI-assisted analysis of stride3d/stride@96fad776d2 (2026-09-14). Data as JSON: /api/errors/009f8091ed0b2234. Report an issue: GitHub.

Appendix: source

Thrown at sources/engine/Stride.Input/Simulated/InputSourceSimulated.cs:118

        public void RemoveAllKeyboards()
        {
            foreach (var keyboard in keyboards)
                UnregisterDevice(keyboard);
            keyboards.Clear();
        }

        public PointerSimulated AddPointer()
        {
            var pointer = new PointerSimulated(this);
            pointers.Add(pointer);
            RegisterDevice(pointer);
            return pointer;
        }

        public void RemovePointer(PointerSimulated pointer)
        {
            if (!pointers.Contains(pointer))
                throw new InvalidOperationException("Simulated PointerDevice does not exist");
            UnregisterDevice(pointer);
            pointers.Remove(pointer);
        }

        public void RemoveAllPointers()
        {
            foreach (var pointer in pointers)
                UnregisterDevice(pointer);
            pointers.Clear();
        }
    }
}

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